Method of making knives



(No Model.)

- G. M. GRISWO'LD. METHOD OF MAKING KNIVES.

Patented Sept. 18, 1894.

' WITNESSES: INVENTOR fi f ffikp/d' G0HG M Gmswow M BY ATTORNEY UNITEDSTATES PATENT O FICE.

GEORGE M. GRISWOLD, OF NEW HAVEN, CONNECTICUT.

METHOD OF MAKING KN IVES.

SPECIFICATION forming part of Letters Patent No. 526,033, datedSeptember 18, 1894.

7 Application filed November 6, 1 893. Serial No. 490,104. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE M. GRISWOLD, a citizen of the United States,and a resident of New Haven, in the county of New Haven and State ofConnecticut, have invented certain new and useful Improvements inMethods of Making Knives, of which the following is a specification.

This invention relates to cutlery, and more particularly to knives orforks and the method of making the same which consists in producing acase knife and handle complete from a single piece of sheet metal by aseries of operations. It is also an important object in the manufactureof this knife to provide it with a hollow handle,'and one whichwill belight, tight and durable and at the same time to produce it in a mannerwhich shall be inexpensive and for all purposes practical. Thisinvention is equally applicable to all styles and grades of knives, froma toy knife to a carver, so long as it is desirable that the entirehandle and knife should be produced of metal, and I also find that it isquite practical to subject this handle to the operation of ornamentaldies and thus produce an ornamented handle. In the drawings however Ihave not shown this operation since it forms no part of the invention itbeingawell known step to those skilled in the art to which thisinvention relates.

In order that those skilled in the art to which this inventionappertains may fully understand its construction and method ofmanufacture, I will proceed to describe the same in detail, referencebeing had to the accompanying drawings which form a part of thisspecification and in which the same numerals and letters denote likeparts throughout the drawings.

It will be seen from the accompanying drawings that it takes practicallybut three operations upon the stock to produce my novel knife andhandle.

The first operation is to stamp out the blank which is clearlyillustrated in Figure l of the drawings. Fig. 2, shows a pair of formingdies the blank in a position to be operated upon. Fig. 3, shows the samepair of dies and the same blank the operation being completed. Fig. 4,shows the knife blank after the second operation and as it would appearwhen taken out from the dies, shown in Fig. 3. Fig. 5, shows the closingdies, the blank placed therein and ready for the closing and finaloperation. Fig. 6, shows the same dies as are shown in Fig. 5, also theblank, the operation completed. Fig. 7, shows the completed knife astaken from the dies illustrated in Figs. 5 and 6.

In this invention I do not wish to confine myself to the outline of theblank from which this knife and handle is produced, since this may bevaried in many particulars. Nor do I wish to be confined to the form andnumber of these dies which are used to produce this knife and handle,since these may also be varied without departing from the spirit of theinvention. In the accompanying drawings I have illustrated a preferredform of blank, also a thoroughly practical set of dies for working saidblank.

Upon the accompanying drawings A indicates a blank which is stamped fromsheet metal the same being of any suitable thickness. The blade portionthereof indicated by 1, and handle portion by 2, this blank is placedupon a female die 3 the handle portion of the blank being suitablyplaced over a recess in said die while the blade portion of theblankwouldextend beyond, and be clear from the operation of the dies.After this blank is properly placed upon this die as shown in Fig. 2 itwould be operated upon by the male die 4, said operation being showncomplete in Fig. 3. It will be seen that this operation upon the handleportion 2 of the blank leaves the handle a little more than half closedover. (See Figs. 4 and 5.) From these dies the blank is placed uponanother die 5 which is sufficientlylong enough to receive the entireblade and handle, and is operated upon in asimilar manner byacorresponding die 6 which serves to swage the blank firmly together alsoturning the ends of the handles in forming them perfectly round andsmooth,

-thus obviating the necessity of brazing and at the same time swagingthe back of the blade and cutting edge which serves to stiffen andtemper the knife.

In order to strengthen the knife at thej unction of the blade andhandle, where knives are usually weak, I have extended the handle wellupon the blade portion as is shown in the drawings and indicated by 7.

Having thus described my invention, I claim- 1. The herein describedmethod of producing a case knife and handle from sheet metal, whichfirst consists in stamping out a blank having a blade and handleportion, said handle portion extending upward and forward from line ofback of blade, second forming longitudinal depressions in the oppositesides of said handle portion, and third closing said handle portion uponitself, thus forming a completed knife having a closed hollow handleintegral with the blade.

2. The herein described method of producing a case knife and handle fromsheet metal,

ing into and integral with the blade portion thereof.

Signed at New Haven, in the county of New Haven and State ofConnecticut, this 3d day of November, A. D. 1893.

GEORGE M. GRISWOLD.

\Vitnesses:

LOUIS A. BABCOOK, JAs. M. PILCHER.

